The Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions submitted by the Nevada Division of Environmental Protection (NDEP) to address the interstate transport requirements of Clean Air Act (CAA) with respect to the 2008 ozone national ambient air quality standard (NAAQS). We are approving the portion of the Nevada SIP pertaining to requirements prohibiting significant contributions from Nevada to nonattainment or interference with maintenance in another state.